Explore topic-wise MCQs in Microwave Engineering.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Microwave Engineering knowledge and support exam preparation. Choose a topic below to get started.

1.

RF input matching and RF-LO isolation can be improved through the use of:

A. Balanced mixer
B. Single-ender diode mixer
C. Single ended FET mixer
D. Image reject mixer
Answer» B. Single-ender diode mixer
2.

The curve of FET transconductance v/s gate-to-source voltage is a straight line through origin.

A. True
B. False
Answer» C.
3.

The IS-54 digital cellular telephone system uses a receive frequency band of 869-894 MHz, with a first IF frequency range of 87 MHz, one possible range of local oscillator frequency is:

A. 956 to 981 MHz
B. 750 to 784 MHz
C. 869 to 894 MHz
D. None of the mentioned
Answer» B. 750 to 784 MHz
4.

RF_INPUT_MATCHING_AND_RF-LO_ISOLATION_CAN_BE_IMPROVED_THROUGH_THE_USE_OF:?$

A. Balanced mixer
B. Single-ender diode mixer
C. Single ended FET mixer
D. Image reject mixer
Answer» B. Single-ender diode mixer
5.

THE_CURVE_OF_FET_TRANSCONDUCTANCE_V/S_GATE-TO-SOURCE_VOLTAGE_IS_A_STRAIGHT_LINE_THROUGH_ORIGIN.?$

A. True
B. False
Answer» C.
6.

The IS-54 digital cellular telephone system uses a receive frequency band of 869-894 MHz, with a first IF frequency range of 87 MHz, one possible range of local oscillator frequency is?

A. 956 to 981 MHz
B. 750 to 784 MHz
C. 869 to 894 MHz
D. None of the mentioned
Answer» B. 750 to 784 MHz
7.

A mixer having high conversion loss is said to have very high:

A. Gain
B. Loss
C. Bandwidth
D. None of the mentioned
Answer» C. Bandwidth
8.

A mixer can be used for both up conversion and down conversion at the transmitter and receiver respectively.

A. True
B. False
Answer» B. False
9.

A mixer consists of a non-linear device that produces various harmonics of the input frequency.

A. True
B. False
Answer» B. False
10.

An ideal _______ produces an output consisting of the sum and difference frequencies of the two input signals.

A. Mixer
B. Amplifier
C. Product modulator
D. Phase modulator
Answer» B. Amplifier
11.

If the input power for a frequency doubler is 10.7 mW and the output measured after the frequency doubling process is 21 mW, then the conversion gain for the frequency doubler is:

A. 4.5 dB
B. 8.4 dB
C. 9.8 dB
D. 2.9 dB
Answer» E.
12.

A major characteristic property required by frequency multipliers for frequency multiplication to happen is:

A. High gain
B. High conversion efficiency
C. Non linearity
D. None of the mentioned
Answer» D. None of the mentioned
13.

Transistor multipliers are more efficient compared to diode multipliers from all operational aspects.

A. True
B. False
Answer» B. False